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Why do I have to use a number 2 pencil?
Content Provider | TED Ed |
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Description | Watch these recommended TED-Ed Lessons Should we get rid of standardized testing? Although standardized testing is a particularly hot topic in education right now, this approach to measurement has been in use for two millennia. And while the results of standardized testing can help us understand some things, they can also be misleading if used incorrectly. So what do these tests actually measure? And are they worthwhile? Arlo Kempf investigates. Which is stronger: Glue or tape? The oldest glue in the world is over 8,000 years old and comes from a cave near the Dead Sea. Today, we have enough types of tape and glue to build and repair almost anything. But what gives glue and tape their stickiness? And is one stronger than the other? Elizabeth Cox explores the world of adhesives. Additional references Ever wondered about the lead in pencils? - The Washington Post Despite the name, they have never been made of lead. |
Language | English |
Access Restriction | Open |
Subject Keyword | Design Engineering Technology |
Content Type | Video |
Time Required | PT2M36S |
Education Level | Class IX Class X Class XI Class XII |
Pedagogy | Lecture cum Demonstration |
Resource Type | Video Lecture |
Subject | Fine Art Architecture Technical |